<HTML>< WEB found a gfreat deal of information about it. Here is one page. http://www.americancryogenics.com/process.html . On one of the other sites<B= R> (don't remember which one now) showed a crosssectin of metal before and after treatment. The treatment takes 48-72 hours and apparently does change<= BR> the molecular structure of the metal. There were testimonials from drummers<= BR> about their cymbals amd a saxophonist bragging about his better sounding horn. I am no scientist, just curious. Dennis Benson RPT www.DennisBenson.com Piano Technician Piano Disc Installation Web Design>> </BLOCKQUOTE> In the past several years= a few entrepreneurial brass instrument repair persons have made a big push = to have horns treated in this manner.  I have heard the results of this= principally on trumpets, since they are smaller (and therefore cheaper to t= reat) than the others, and to my ears (professional brass player) these play= ers sounded just as good as they did before the instruments were treated.&nb= sp; Net gain IMHO.....................nothing, though there was also no loss= .  That alone is reason for me to suspect somewhat the efficacy of trea= tment on brass instruments. Ron N. asked how this might apply to wood................SERIOUS doubts from= this quarter, except to be concerned about its possible demise! Stan Ryberg Barrington IL Associate Member mailto:jstan40@aol.com</HTML>